NGC 2903 is an isolated barred spiral galaxy in the equatorial constellation of Leo, positioned about 1.5° due south of Lambda Leonis. It was discovered...

galaxies with double cores still far apart. An example active double nucleus is NGC 6240. Much closer black-hole binaries are likely in single-core galaxies...

NGC 1409 is a quiescent lenticular galaxy in the equatorial constellation of Taurus. It was discovered by the German-born astronomer William Herschel...

NGC 2800, also known as PGC 26302, is an elliptical galaxy in the constellation Ursa Major. It was discovered February 17, 1831 by William Herschel. Skrutskie...

NGC 2509 is an open cluster in the constellation of Puppis. It was discovered on 3 December 1783 by William Herschel. It was described as "bright, pretty...

NGC 1410 is a peculiar lenticular galaxy in the constellation Taurus. It was discovered on January 17, 1855, by English astronomer R. J. Mitchell. NGC...

NGC 2950 is a lenticular galaxy in the northern constellation of Ursa Major, about 50 million light years from the Milky Way and receding with a heliocentric...

mathematician and contributor to group theory MPC · 9130 9132 Walteranderson 2821 P-L Walter Anderson (born 1953), chief executive officer of Entreé International...

NGC 2803, also known as PCG 26181, is an elliptical or lenticular galaxy in the zodiac constellation Cancer. It was discovered March 21, 1784, by William...

Age 4.16±2.54 Gyr Other designations ι Gem, 60 Geminorum, BD+28° 1385, FK5 282, HD 58207, HIP 36046, HR 2821, SAO 79374. Database references SIMBAD data...

Bibcode:1999PhRvD..59h4006B. doi:10.1103/physrevd.59.084006. ISSN 0556-2821. S2CID 14951569. Abbott, B. P.; Abbott, R.; Abbott, T. D.; Abernathy, M....